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Running Number
6,576,017
HEX
#645791
RGB
100, 87, 145
HSL
253°,25%,45%
HSV
253°,40%,57%
CMYK
31%,40%,0%,43%
Brightness
38%
Type
Dark
AA Normal Text: ≥ 4.5:1
AA Large Text: ≥ 3.0:1
AAA Normal Text: ≥ 7.0:1
AAA Large Text: ≥ 4.5:1
#645791 sits at 253° on the color wheel, placing it in the blue family of the cool half of the spectrum. With 25% saturation and 45% lightness, it reads as a softly muted, balanced tone — a balanced mid-energy presence that sits comfortably alongside other UI tones. Its RGB mix of 100, 87, 145 produces a 6.34:1 contrast ratio against white, which clears WCAG AA for body text in that pairing.
In RGB space #645791 is a clear variant of CSS dim gray — about 44 units away from #696969. Designers reach for blue hues at this saturation when the brief calls for restraint and atmosphere, and at this lightness when they want a present, comfortable mid-canvas voice. On screen the cool cast tends to pair best with warm neutrals in the 25°-45° range to add life.
See how this color appears in real UI elements
Button (filled)
Badge
Progress Bar
Link Hover
Input Focus Ring
Checkbox Active
Toggle Switch On
Slider Thumb
Card Border
Icon Highlight
Tooltip Background
Modal Header
Tab Active
Alert Box
Timeline Dot
Loading Spinner
Dropdown Selected
Table Row Highlight
Calendar Date
Mobile Device
See how to use #645791 in different programming languages
| Platform | Languages |
|---|---|
| Frontend | |
| Mobile | |
| Backend | |
| Others |
document.getElementById("box").style.backgroundColor = "#645791";💡 Click any tab to see how to use #645791 in different programming languages